Abstract : A bi-phased coded spread spectrum radar signal generator was developed to be used in testing the effectiveness of ESM receivers. The generator permits code sequences to be selected to a maximum value of 10, which in turn sets the microwave pulse width from 10 to a minimum of 2 micro sec. The PRF of microwave pulses is nominally set at 1 KHz and carrier frequency is selectable in 100 MHz increments from 8-12.4 GHz.